23-12-15, 08:15 PM
I normally push them out another 2mm from where they were before so that a clean part is just exposed.
I'll get to work with a can of brake cleaner and a toothbrush to clean the Pistons as much as possible, then once done I'll smear red rubber grease around the exposed parts of the piston then personally use a g-clamp to gently push the Pistons back far enough to allow the new pads to fit.
The thing is, I do this at least twice a year and it keeps the caliper in good working condition.
If it's not done regularly then it either gets clogged up with brake dust or if there's no grease protection then there's a good chance you can get spots of rust, which can both cause a piston to seize up.
It does sound to me like you have a sticking piston, because once all cleaned up you should be able to put the bike on the centre stand and after pressing the brake lever the rear wheel should be reasonably free to spin.
With brand new pads you may get some rubbing initially as they bed in, which will actually take a bit longer than 10 miles to settle down, but if the caliper hasn't been cleaned regularly then I'd hazard a guess it is sticking. It won't be kind on the disc either, depending on what compound of pads you're using, so will need to be sorted sooner rather than later.
I'll get to work with a can of brake cleaner and a toothbrush to clean the Pistons as much as possible, then once done I'll smear red rubber grease around the exposed parts of the piston then personally use a g-clamp to gently push the Pistons back far enough to allow the new pads to fit.
The thing is, I do this at least twice a year and it keeps the caliper in good working condition.
If it's not done regularly then it either gets clogged up with brake dust or if there's no grease protection then there's a good chance you can get spots of rust, which can both cause a piston to seize up.
It does sound to me like you have a sticking piston, because once all cleaned up you should be able to put the bike on the centre stand and after pressing the brake lever the rear wheel should be reasonably free to spin.
With brand new pads you may get some rubbing initially as they bed in, which will actually take a bit longer than 10 miles to settle down, but if the caliper hasn't been cleaned regularly then I'd hazard a guess it is sticking. It won't be kind on the disc either, depending on what compound of pads you're using, so will need to be sorted sooner rather than later.
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